Online Alarm Clock
Arm a local browser alarm for the next occurrence or selected repeat days.
Loading Tool…
What Is the Online Alarm Clock?
The Online Alarm Clock schedules a local alarm at a 24-hour time, optionally limited to selected weekdays, and shows its next occurrence and remaining minutes.
How It Works
Enter the hour and minute, optionally choose repeat days, then arm the alarm. Keep the page open and the device awake.
When to Use It
Use it as a convenient foreground reminder while working at a computer. It is not a replacement for an operating-system or safety-critical alarm.
Frequently Asked Questions
- Will It Ring If The Computer Sleeps?
- Not reliably. Browser suspension, sleep, closed tabs and muted audio can prevent playback.
Found an issue? Send Feedback. See our data sources and update policy for tools that depend on changing information.
Popular Tools
Text Tools
Title Case Converter
Convert text to title case with smart rules for articles, conjunctions and prepositions.
Developer Tools
QR Code Generator
Create styled QR codes for URLs, text, email, SMS and calendar events, then export them for screen or print.
Developer Tools
JSON Formatter & Minifier
Beautify, validate and minify JSON with clear parse errors.
Font Styles
Unicode Text Converter
Preview your text in 35+ Unicode styles at once with copy buttons and favorites.
Text Tools
Word Counter
Count words, characters, sentences and paragraphs in real time, with reading time and keyword density.
Crypto & Security
Strong Password Generator
Generate secure random passwords using cryptographic randomness.